Hi
I facing same problem, when I was cliks “insert into post” the system so this message
“Not Acceptable
An appropriate representation of the requested resource /wp-admin/media-upload.php could not be found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.”
I do not have any idea to solve that problem, ever i try all suggestion for settle slider issue. May i get the ideas? Thanks a lot.